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Tension Leveling
In many cases,
the sheet metal flatness required of today's strip metal processors can only
be achieved by the use of tension levellers. Precision flatness is obtained
when the metal's fiber lengths are made uniform across the entire width of
the strip by elongating the metal beyond its yield point. When the strip is
passed through the leveller under tension internal stresses within the metal
are eliminated, and flatness or shape correction to tolerances approaching
zero "I" units can be achieved.
Tension Levelling lines can be "Coil-to-Coil"
or "Coil-to-Sheet" type or a
combination. Dassnagar manufactures both
varieties for processing both ferrous and non-ferrous strip.
Dassnagar tension leveller capacities range from strip thickness 0.15 mm to
3.5 mm and strip width 1,000 mm (39")
to 2,461 mm (96").
We also offer combination lines with both
coil-to-coil and coil-to-sheet
facilities.
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Tension Leveller
Consists of an un-driven leveller arrangement with
entry and exit
tension bridles. The degree of elongation required to level the
strip is primarily determined by the differential in speed or
tension generated between the two bridles. This is controlled
automatically by a microprocessor based system. Bridles vary in
configuration and complexity, depending on the type and dimensions
of the strip metal to be processed. They can be equipped with
several different drive systems. These include closed-loop
mechanical differentials, all-electric drives and combination
electro-mechanical drives.
Depending upon the customer's application and material to be run,
our levellers can be equipped with two, four, five or seven work-roll
modules. Work-roll configurations include six-high for processing
surface-critical strip and four-high for non surface-critical
applications. In several designs, the work-roll modules are
removable for cleaning and maintenance. With others, the entire
upper frame of the leveller can be pivoted open to allow access for
cleaning and maintenance. All levelers feature neutralizing sections
which follow the work-roll modules. They relieve the stresses
induced in the strip as it passes, under high tension, over the last
work roll. Neutralizers can be of two-roll or multiple-roll design
and neutralises cross bow and cannoe.
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Salient Features
- wide processing range 0.128 to 6.21
mm, 1000 to 2461 mm, input coil
wt 40 Mt for
strips,
- suited to process full hard, annealed,
stainless steel and aluminium,
- high productivity - top operating speed of 300
MPM,
- five-roll, four-high leveller with segmented back- ups and two
roll neutralizing section,
- all-electric driven bridles control speed and tension in this
tension-leveling section,
- four-roll, six-high unit for extended gauge range applications,
- two-roll, six-high unit with multi-roll neutralizing section,
- removable roll catridges for galvanising line,
- entry end of coil-to-coil line featuring inspection area to
check quality of strip flatness,
- tension levelling section utilizes closed-loop mechanical drive
arrangements,
- servicing within 48 hrs in any corner of the world,
- readily shippable spare parts,
- in house manufacturing of all equipment
to maintain quality
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